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Modélisation et analyse paramétrique des roues déshydratantes au gel de silice.

Modelling and parametric analysis of silica-gel desiccant wheels.

Auteurs : NARAYANAN R., SAMAN W. Y., WHITE S. D., et al.

Résumé

A number of mathematical models have been developed to predict the heat and mass transfer behaviour of moisture transport in air dehumidification applications, with rotary desiccant wheels. A complete model would account for the following mechanisms of transport: 1) convective transport of heat and moisture between the air and the desiccant surface (gas side resistances); 2) diffusion of moisture and conduction of heat through the solid desiccant layer (solid side resistances). The differential equations, that represent these transport mechanisms, will generally be set up to describe a single desiccant coated flow channel, traversing through the respective supply and regeneration air streams in a 360 degree circular path. Symmetry would suggest that the differential equations be solved in two directions (axial and radial). However, many authors have found that a simple one dimensional (axial) model with gas side resistances only, adequately predicts the experimental performance of air dehumidification in rotary desiccant wheels. In this paper, a heat and mass transfer model is presented incorporating gas side resistances. The model shows reasonable agreement with experimental data. The model is used to conduct a parametric analysis to determine the optimum rotation speed of the wheel at various regeneration temperatures.

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Pages : 2010-2

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    20 €

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Détails

  • Titre original : Modelling and parametric analysis of silica-gel desiccant wheels.
  • Identifiant de la fiche : 2010-1557
  • Langues : Anglais
  • Source : 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2010). Proceedings. Sydney, Australia, April 12-14, 2010.
  • Date d'édition : 12/04/2010

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